Metallic packing.



Patented luly 24, |900.

T. H. HOLMES.

E METALLIC PACKING.

` (Application med Aug. 2a, 1899.)

TH: Nanms paens co. Fumom'no.. wAsmNoroN. n. c.

No. 654,542. Patented ]uiy 24, |900.

T. `H. HOLMES.

' METALLIC PACKING.

(Application `1ed Aug. 28, 1899.)

(No Model.) 2 Sheets-Sheet 2 5o three ring-sections; but it will beunderstood Unirse States trice.

Parent METALLIC PACKING.

SPECIFICATION forming part of Letters Patent No. 654,542, dated July 24,1900.

Application filed August Z8, 1899.

Serial No. 728,747. (No model.)

To all whom, t may concern:

Be it known that I, THOMAS H. HOLMES, a citizen of the United States,and a resident of VVilkes-Barr, Pennsylvania, have invented certainImprovements in Metallic Packing, of which the following is aspecification.

My invention relates to certain improvements in metallic packingwherebyV the two sections of the containing-casing can be accuratelyalined.

The object of my invention the construction of the rings, scribedhereinafter.

In the accompanying drawings, Figure lis a sectional view illustratingmy improved packing. Fig. 2 is a plan view of the casing. Fig. 3 is aplan view of one of the rings. Fig. 4 is a plan View of one of the otherrings. Fig. 5 is a perspective view of the casing detached, and Fig. 6is a detached perspective view of a section of one of the rings.

A is a casing made in two halves A and A2. This casing has a series ofcavities ct, separated by partitions c'. These cavities are formed toreceive the packing-rin gs B and D. The two halves A and A2 of thecasing are secured together by screws c, and in order to aline thecasing so that the several partitions of the casing will aline properlyI drill holes in each end of the casing, partly in one section andpartly in the other, and inserted in these holes are ribbed or serratedplugs t'. The holes are preferably screw-threaded, and the plugs c' arealso threaded, the threads on the plugs not only holding the plugs inposition, but also act as ribs or serrations to aline the two parts ofthe casing. The ycenter of each hole is preferably to one side of thedivision-line, so that the screw-threaded plugs will be held in onesection ofthe casing when the casing is removed. By making the plugsscrew-threaded I provide a ribbed or serrated face, whereby the sectionsof the casing are held in more perfect line than if smooth dowel-pinswere used. The casing can be removed and the sections separated andplaced together, the threaded plugs insuring accuracy.

In the drawings I have shown a casing with is to improve as fully dethatone or more sections may be used, de-

pending altogether upon the amount ot' pack-y ing required.

There are two sets of rings B and D in each recess a. tions, as shown inFig. 3, the sections being separate on radial lines, and these sectionsare held to the rod E by a coiled spring CZ, iitting in a groove d inthe periphery of the ring. The ring B is made up of three sections b, ofthe form clearly illustrated in Fig. 6, the line of separation beingmainly on a tangent. The short portion of the line is radial, as clearlyillustrated in Fig. 4. By having the sections ot' the rings separated,as shown in Fig. 6, the inner and outer bearing-surfaces of each sectionare at an angle to each other, so that the ring can expand or contractwithout opening the joints between the several sections. Surrounding thesections b is a soft metallic ring e, and bearing against this metallicring is a spring f, confining the ring c to the sections and thesections to the rod.

The casing A is adapted to a box G and is held in place by a cap-ring Gand bolts g g in the present instance; butin some instances the casingmay be mounted on the exterior surface ot' a packing-box, where it iswished to apply it to an ordinary form of packing# My invention isespecially adapted to pis- The ring D is made in three secton-rods andvalve-stems, especially of the Oorliss type.

I claim as my invention l. The combination in a metallic packing, of acasing made in two sections, means for securing the two sectionstogether, and one or more ribbed plugs. adapted to the casing andfitting partly in one section and partly in the other section, wherebythe sections are held against longitudinal or lateral displacement,substantially as described.

2. The combination in a metallic packing, of a two-part casing,packing-rings adapted thereto, one or more screw-threaded plugs mountedin one section of the casing and adapted to screw-threaded cavities inthe other section, substantially as described.

3. The combination in a metallic packing7 of a casing made in two parts,having one or more cavities, packing-rings adapted to the cavities,transverse screws securingthe two IOO sections of the casing together,four screwplugs adapted to screw-threaded holes in the ends of thecasing, said holes being partially in one section and partially in theother, the

center of each hole being on one side of the parting-line so that thescrew-threaded plugs will be held by one section of the casing when theyare parted, substantially as described.

4. The combination in a metallic packing, of a casing having one or morecavities therein, two rings in each cavity, said rings being made inthree sections each, one ring being parted on radial lines and situatednext to the steam chamber, the other ring being parted on lines partlyradial and partly tan gential, whereby the steam from the chamber willgain access to the periphery of the second ring through the radialchannels between the sectionsof the first ring, substantially asdescribed.

5. The combination in a metallic packing,

of a casing having one or more cavities therein, two rings in eachcavity, 'said rings being made in three sections each, one ring beingparted on radial lines and situated next to the steam-chamber, the otherring being parted on lines partly radial and partly tangential, and asoft-metal band extending around the periphery of the last-mentionedring,whereby the steam from the chamber will gain access to theperiphery of the band on the second ring through the radial channelsbetween the sections of the first ring, substantially as described.

In testimony whereof l have signed my name to this specification in thepresence of two subscribing Witnesses.

THOMAS H. HOLMES.

Witnesses:

WM. J. TREMBATH, M. E. JOYCE.

